I found a great site for viewing space - http://www.worldwidetelescope.org/ExperienceIt/ExperienceIt.aspx
To control the use of bandwidth, teachers could project the information for the class! Also, I can see some students pursuing this at home (if they were into studying the sky) if they were given the website after a short view in class. Maybe it could be a homework research assignment activity where students pursue something they wish to learn - or for those advanced students an alternative assignment! - it is a fun and unique set up.

Below are a few sites that have created lessons for teachers. The CBC site lists several topics with corresponding lessons. Once you have chosen a topic, it provides an archived video or audio clip and lessons for different grade levels. For example, if you are looking for information on Pierre Trudeau, CBC will provide the information, then suggest different ways in which the info could be used from grades 6-8 or 11-12.

http://archives.cbc.ca/for_teachers/

While the PBS site is American, there are several lessons and interactive activities useful for everything from teaching Shakespeare to Math. Once you have chosen a broad topic, such as Math, you can filter the results further by choosing Calculus, Measurement, Probability, etc.

http://www.pbs.org/teachers/classroom/9-12/

There are some free resources on Human Rights available from the organization Youth for Human Rights. I think it could be useful for Middle Years and Senior ELA and Social Sciences. Some of your schools do Human Rights projects at the elementary level as well so I'm sending this for all of you to check out. Here is a part of the email I received about them. You can order the free kits when you check out the link.

"The Youth for Human Rights package is geared toward youth, but I find it is useful in teaching any age group who are learning about what human rights are - i.e. maybe they are young adults, but in terms of learning about human rights, they are just starting! It focuses very much on the UN Universal Declaration on Human Rights as the primary example. This package contains a booklet that has an abridged version on the Declaration with visuals matching the videos. It also contains the full, unabridged Declaration at the back. This package also contains the 30 Public Service Announcements depicting each article in the Declaration, as well as the UNITED music video and the "Story of Human Rights". Plus posters and a detailed curriculum guide. This one is the one I would recommend for anyone - from ages 6 -19.

You can see the package here: http://www.humanrights.com/#/youth/youth-for-human-rights-educators-package-details"